Fix NPE on non-distict multitouch device

Change-Id: I6d8a05bf62e510d0556fa4831b3d510041cca63a
diff --git a/java/src/com/android/inputmethod/keyboard/PointerTracker.java b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
index 29867c3..a95c5cd 100644
--- a/java/src/com/android/inputmethod/keyboard/PointerTracker.java
+++ b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
@@ -459,7 +459,8 @@
                         keyboard.updateSpacebarPreviewIcon(diff);
                         // Display spacebar slide language switcher.
                         showKeyPreview(keyIndex);
-                        queue.releaseAllPointersExcept(this, eventTime, true);
+                        if (queue != null)
+                            queue.releaseAllPointersExcept(this, eventTime, true);
                     }
                 }
             }
@@ -551,7 +552,8 @@
 
     public void onLongPressed(PointerTrackerQueue queue) {
         mKeyAlreadyProcessed = true;
-        queue.remove(this);
+        if (queue != null)
+            queue.remove(this);
     }
 
     public void onCancelEvent(int x, int y, long eventTime, PointerTrackerQueue queue) {